what's this?中的what是什么词性?

what's this?中的what是什么词性? what's this? what s this回答 whats this what's this是什么意思 What's this? 翻译 what’s this? this's what i what's this? what's this What’s.this.( )Chinese what's this? what's this ___________chinese what's this __english. What’s this in ( ) what's this( )English? what's this what's this?